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public interface Runnable
The Runnable
interface should be implemented by any class
whose instances are intended to be executed by a thread. The class must
define a method of no arguments called run
.
This interface is designed to provide a common protocol for objects that wish
to execute code while they are active. For example, Runnable
is implemented by class Thread
. Being active simply means
that a thread has been started and has not yet been stopped.
In addition, Runnable
provides the means for a class to be
active while not subclassing Thread
. A class that implements
Runnable
can run without subclassing Thread
by
instantiating a Thread
instance and passing itself in as the
target. In most cases, the Runnable
interface should be used
if you are only planning to override the run()
method and no
other Thread
methods. This is important because classes should
not be subclassed unless the programmer intends on modifying or enhancing the
fundamental behavior of the class.
Thread
Method Summary | |
---|---|
void |
run()
When an object implementing interface Runnable is used to
create a thread, starting the thread causes the object's run
method to be called in that separately executing thread. |
Method Detail |
---|
void run()
Runnable
is used to
create a thread, starting the thread causes the object's run
method to be called in that separately executing thread.
The general contract of the method run
is that it may take
any action whatsoever.
Thread.run()
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